<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>

        #box1 {
            width: 200px;
            height: 100px;
            background-color: red;
            padding-top: 100px;
        }
        #box2 {
            width: 100px;
            height: 100px;
            background-color:blue;
        }


    </style>


</head>
<body>
    

    <!-- <div id="box1"></div>
    <div id="box2"></div> -->

    <div id="box1">
        <div id="box2"></div>

    </div>
    
</body>
</html>